JPH07164409A - Building material having antibacterial capacity - Google Patents

Abstract

PURPOSE:To provide a material having antibacterial capacity used as an interior material of a home or a general wooden building material. CONSTITUTION:A wooden base material is painted with paint mixed with fine particles with a particle size of 2-5mum of synthetic zeolite (aluminosilicate) compounded with a metal ion having high antibacterial properties such as a silver, copper or zinc ion. By a conventinal painting method, a wooden building or interior material suppressing the activity of bacteria or fungi such as E. coil, Pseudomonas, Staphylococcus aureus, Candia bacteria, bakers yeast or black mold and blocking the generation of a malodor caused by bacteria can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior of a building, or a wood-based building material or a housing material used for the interior.

[0002]

2. Description of the Related Art Conventionally, for the interior of such a building or a wood-based material used for the interior, a material whose surface is coated is often used for the purpose of protecting the base material and aesthetics.

[0003]

However, in recent years, due to the widespread use of air conditioning in the home, the number of bacteria in the home is increasing on the contrary. Especially, when breeding pets indoors, the propagation of these bacteria is proliferated. It is said that the number is rapidly increasing.

[0004] It is necessary to cope with such domestic bacteria, and in particular, in order to reach an aging society, a house close to a sterile state is required.

In order to meet such needs, an object of the present invention is to provide a material having an antibacterial property for home interior or a general wooden construction material.

[0006]

The wood-based building material of the present invention comprises a synthetic zeolite (aluminosilicate) containing 2 to 5 microns of a synthetic zeolite (aluminosilicate) containing a metal ion such as silver, copper or zinc having a high antibacterial effect. The object was achieved by applying a paint in which a small amount of fine particles were added and mixed.

The building materials and housing materials to be painted can be applied to flooring, stair treads, handrails, kitchen doors, etc., whereby antibacterial performance can be imparted.

[0008]

[Function] The antibacterial zeolite does not affect the characteristics of the coating because it is only added in a small amount of 2 to 5 microns, and the conventional coating method can be applied as it is. When the paint is applied, does not affect the antibacterial performance of metal ions, and can semipermanently maintain the antibacterial performance on the applied surface.

[0009]

[Example] An antibacterial paint was prepared in the following manner.

A fine antibacterial zeolite (trade name) having a size of 2 to 5 μm, which is prepared by adding silver ion as a metal ion to an amino resin and urethane resin coating, is added to the resin solid component in an amount of 3.0. It was added and compounded by weight%.

This antibacterial coating was applied as a wood floor top coat (top coating) to confirm the antibacterial performance and the suitability of the floor coating.

The antibacterial performance is the result of an antibacterial activity evaluation test carried out by the Kyoto Institute for Microbial Research.

The antibacterial activity was evaluated by the following procedure.

Preparation of Bacterial Fluid of Bacteria Test bacterial cells cultured in an agar medium at 37 ° C. for 18 hours were suspended in a phosphate buffer solution (1/15 MPH7.2) for 10 ⁸
A cell / ml suspension was prepared, diluted appropriately, and used in the test.

Test Method of Drop Method The bacterial solution was dropped on each surface of the test piece and stored at 25 ° C. ± 5 ° C. For the measurement, the viable cell count was measured for the bacterial solution on the test piece.

Test strain As a test strain, Escherichia coli (Escherichia co
Li IFO-12734), the initial number of bacteria was 6.2.
It was performed for × 10 ⁵ cells / ml.

Medium Used Mueller Hinton was used as a bacterium of the medium used.
2 was used.

As a result of the antibacterial activity evaluation test, as shown in Table 1, the viable cell count of the test bacteria became 0 after 6 hours. On the other hand, when the antibacterial zeolite was not added, there was a considerable amount of viable bacteria.

As a test for confirming the suitability of the floor coating film, the adhesion state was confirmed, the secondary adhesion state was confirmed by a cellophane tape test after soaking in hot water at 70 ° C. for 2 hours, and after holding at 80 ° C. for 2 hours, the temperature was changed to -20 ° C. for 2 hours. As a result of repeated cold heat repeated tests of holding for a period of time and discoloration tests by a fade meter, no abnormality was observed even when the antibacterial zeolite was added.

[0020]

[Table 1] In addition, the LD ₅₀ of the acute toxicity test (mouse) was 5 g /
Mutagenicity test (Labor Standards Bureau No. 261
No. Ames test shows a negative result, and a weak stimulant (P.I.
Safety was confirmed by I 0 to 0.06).

[0021]

The present invention has the following effects.

(1) Escherichia coli,
It is possible to obtain wood-based construction and interior materials that suppress the activity of bacteria and mold such as Pseudomonas aeruginosa, Staphylococcus aureus, Candida, baker's yeast, black mold and mold, and also prevent the generation of malodor caused by fungi. it can.

(2) Since an inorganic antibacterial agent is used, it is excellent in safety in terms of acute toxicity, mutagenicity, and primary skin irritation, as compared with organic systems.

(3) The antibacterial effect is semi-permanent because the amount of the metal ions applied is extremely small.

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Claims (1)

[Claims] 1. A building material having antibacterial performance, which is obtained by adding a paint obtained by adding and mixing fine particles of synthetic zeolite to which metal ions having a high antibacterial effect are added and mixed, to a wood-based building material.